ICD-10 · PDGM grouping
R74 Abnormal serum enzyme levels
All 4 codes in the R74 family, with the PDGM clinical group, comorbidity subgroup and primary-position rule CMS assigns, read from the CMS grouper crosswalk v07.2.26 and the CDC FY2027 code file.
Codes in family
4
Can lead a claim
0
Cannot lead a claim
4
What CMS assigns to R74
None of the 4 codes is assigned a clinical group. None of the 4 is assigned a comorbidity subgroup. None can lead a claim.
Every code in R74
Descriptions are CDC’s FY2027 wording; where CMS’s grouper abbreviates one, its form is shown beneath.
| Code | Description | Primary position | Clinical group | Comorbidity subgroup |
|---|---|---|---|---|
| R74.0 Nonspecific elevation of levels of transaminase and lactic acid dehydrogenase [LDH] | ||||
| R74.01 | Elevation of levels of liver transaminase levels | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| R74.02 | Elevation of levels of lactic acid dehydrogenase [LDH] | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| R74.8 | Abnormal levels of other serum enzymes | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| R74.9 | Abnormal serum enzyme level, unspecified | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
Sources: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01, for the clinical group, comorbidity subgroup, code-first conventions and primary-position flags; CDC NCHS ICD-10-CM FY2027 code descriptions for the family title and code wording. This is the crosswalk Medicare runs a claim through. Grouping also depends on admission source, timing, the OASIS functional items and the rest of the diagnosis list.
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